U.S. Sen. Angus King (IMaine) has gotten in on the ALS Ice Bucket Challenge.

As touted in a press release from King’s office, he accepted the challenge from John Gregoire of Windham, who is in the later stages of ALS, and Sarah Caldwell of Falmouth, a Prudential Spirit of Community Service Award winner who lost her father to ALS last year.

The ALS Ice Bucket Challenge has swept the country as a way to raise money and awareness to find a cure for ALS.

“This is dedicated to my friend, Joe Mayo, who ALS took from us some years ago and my friend from high school football, Greg Munro, who is struggling with ALS right now,” Senator King said. “And the challenge is to three of my Senate freshman colleagues: Tim Kaine of Virginia, Jeff Flake of Arizona, and Ted Cruz of Texas!”

As of today, the ALS Association has received $15.6 million in donations compared to $1.8 million during the same time period last year (July 29 to Aug. 18), which have come from existing donors and 307,598 new donors to The Association.

ALS, also known as Lou Gehrig’s Disease, is a progressive neurodegenerative disease that affects nerve cells in the brain and the spinal cord. Eventually, people with ALS lose the ability to initiate and control muscle movement, which often leads to total paralysis and death within two to five years of diagnosis. There is no cure and only one drug approved by the U.S. Food and Drug Administration that modestly extends survival.